"A student asked why Roth engages in fieldwork such as operating room visits to conduct his research. The professor pointed out that markets have too many unwritten rules and are too complex to understand only through books. There are also many culture-related rules that need to be learned through direct experience. If someone designs the Japanese market, that person should be Japanese, someone who truly understands Japanese culture. This comment visibly moved the audience and will undoubtedly motivate students as they pursue their future study and research activities."